Novel oxidative coupling reactions of cisapride or metaclopramide with phenoxazines and their applications in the determination of nitrite at trace level in environmental samples.

Novel oxidative coupling reactions of cisapride or metaclopramide with phenoxazines and their applications in the determination of nitrite at trace level in environmental samples. Research Abstract Details 

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Novel oxidative coupling reactions of cisapride or metaclopramide with phenoxazines and their applications in the determination of nitrite at trace level in environmental samples. Abstract Text:

Riyad Ahmed Al-Okab,Akheel Ahmed Syed,Riyad Ahmed Al-Okab,Akheel Ahmed Syed,Riyad Ahmed Al-Okab,Akheel Ahmed Syed,

Phenoxazine (PNZ), 2-chlorophenoxazine (CPN) and 2-trifluoromethylphenoxazine (TPN) were used as new class of spectrophotometric reagents for the determination of nanoamounts of nitrite in presence of cisapride (CSP) and metaclopramide (MCP) as new electrophilic coupling reagents. The methods were based on the oxidation of CSP or MCP by nitrite in hydrochloric acid medium and coupling with PNZ, CPN or TPN to yield red color derivatives which were stable for about 3h and having an absorbance maximum in the range 520-530nm. Beer's law is obeyed for nitrite in the concentration range 0.08-0.80 and 0.13-1.60mugml(-1) for phenoxazine-cisapride and phenoxazine-metaclopramide, respectively. The optimum reaction conditions and other important analytical parameters were established to enhance the sensitivity of these methods. Interference due to various non-target ions was also investigated. The methods were applied to the analysis of nitrite in environmental samples. The performance of proposed methods were evaluated by Student's t-test and variance ratio F-test indicated the significance of proposed methods over the reference spectrophotometric method (Association of Official Analytical Communities (AOAC) method for the determination of nitrite in water samples).

Novel oxidative coupling reactions of cisapride or metaclopramide with phenoxazines and their applications in the determination of nitrite at trace level in environmental samples. Publishing Authors By Initials

RA Al-Okab,AA Syed,RA Al-Okab,AA Syed,RA Al-Okab,AA Syed,

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Novel oxidative coupling reactions of cisapride or metaclopramide with phenoxazines and their applications in the determination of nitrite at trace level in environmental samples. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Spectrochimica acta. Part A, Molecular and biomole

VOLUME: 68

Page Numbers: 739-46

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ISSN: 1386-1425

DAY: 8

MONTH: 01

YEAR: 2007

Novel oxidative coupling reactions of cisapride or metaclopramide with phenoxazines and their applications in the determination of nitrite at trace level in environmental samples. Information

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LANGUAGE: eng

NlmUniqueID: 9602533

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AFFILIATION: Department of Studies in Chemistry, University of Mysore, Manasagangothri, Mysore 570006, India.

Country: England

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MEDLINETA: Spectrochim Acta A Mol Biomol

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